A rare case of unique and previously unreported variant of transposition of great arteries with bilateral coni, ventricular septal defect, and triple-chambered left ventricle which led to an unexpected and accelerated post-natal cardiac anatomical and physiologic deviation from prenatal and immediate postnatal diagnosis altering the surgical management and patient outcome.
Keywords: Three-chamber; left ventricle; transposition of great arteries; ventricular septal defect.